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omar nasser (@sisi0x) | Hashnode

@sisi0x

omar nasser

@sisi0x

Penetration Tester, building CTFs for web and Android, and Bug Hunter

Joined November 2025

About

I’m a passionate cybersecurity professional specializing in penetration testing, secure code review, and application security.

I sharpen my skills through CTF competitions, bug hunting in live applications, and even creating CTF challenges to test and inspire the community.

Available for

penetration testing (Web & Mobile & API ) and secure code review.

omar nasser's blogs

Huntingsisi0x.hashnode.dev1 post

About

I’m a passionate cybersecurity professional specializing in penetration testing, secure code review, and application security.

I sharpen my skills through CTF competitions, bug hunting in live applications, and even creating CTF challenges to test and inspire the community.

Available for

penetration testing (Web & Mobile & API ) and secure code review.

omar nasser's blogs

Huntingsisi0x.hashnode.dev1 post

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Recently published

ONomar nasserinsisi0x.hashnode.dev

How I Discovered a Hidden GraphQL Mutation Through JavaScript Analysis

Nov 12, 2025 · 3 min read · (صلِّ على النبي ﷺ) When I tested my private program on the main domain — a platform for designing, documenting, testing, mocking, and managing APIs with a strong emphasis on design-first workflows (i.e., define your API contract/spec first, then buil...

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